Question

A decorative floor pattern has 1red square tile surrounded by 12 blue tiles.write and evaluate an expression to show how many total red and blue tiles are needed if there are 15 red tiles. Then make a table showing the total number of tiles if there are 15,20,25, or 30 red tiles

Answer 1

Assuming a single blue tile between red tiles, we have the following table, for a single row of red tiles:
R B
1 12
2 20
3 28
4 36
...

If the red tiles are laid out in a rectangular grid, then we have
R B
1 12
2 20
4 34
...

So, decide on the layout of the red squares before you make your table.